单选题Sodium (钠) is a key component of salt. Eating too much of it can 27 to high blood pressure, a major risk for most people as they age because it can lead to heart disease and other health problems. But cutting sodium from the diet is difficult, mainly because people often don't know it's there. More than three-quarters of the sodium people 28 comes from processed and restaurant foods. And much of the sodium we eat is in foods that don't 29 taste salty, like packaged bread and chicken dishes. Salt is the latest front in the battle to get Americans to eat a healthier diet. 30 efforts have focused on cutting down on sugar, to fight against obesity, and reducing fat, for a healthier heart. After four decades of unsuccessfully 31 Americans to cut salt in their diets only to see them eat more of it, government officials are intensifying their efforts. An advisory committee working on new US Dietary Guidelines, due to be released later this year by the federal government, recently recommended that all adults restrict their 32 of sodium to no more than 1500 milligrams a day, 33 to about two-thirds of a teaspoon of table salt, down from a current limit of 2300 milligrams for some people. The best way to reduce salt is to cut back on processed and restaurant foods, eat fresh produce, and reduce portion sizes. Nutritionists 34 eating whole grain instead of bread—a single slice of packaged bread can contain 150 milligrams to 200 milligrams or more of sodium. Cut back gradually, so your palate (味觉) adjusts to a less salty taste. When you do buy artifactitious (人工制品的) foods, look for 35 with less than 300 milligrams of sodium per serving, or no more than one milligram of sodium per calorie of food, advised the Harvard School of Public Health, which has on its website 25 sodium-reduction 36 developed with the Culinary Institute of America. A. attribute B. consume C. contribute D. equivalent E. incidentally F. intake G. items H. necessarily I. output J. persuading K. Previous L. recommend M. Special N. steps O. strategies